Sound-transmitting display device

Abstract

A sound-transmitting display device. A circuit board (20) has a first surface (21) and a second surface (22) arranged opposite to each other, and sound-transmitting holes in communication with the first surface (21) and the second surface (22); lamp beads (30) are arranged on the first surface (21); the sound-transmitting holes are located between two adjacent lamp beads (30); a side edge of the circuit board (20) is mounted on a frame body (10); the second surface (22) of the circuit board (20) can be provided with a loudspeaker; sound waves generated by the loudspeaker are transmitted to the side of the circuit board (20) provided with the lamp beads (30) by means of the sound-transmitting holes, such that the sound-transmitting effect of a screen is achieved; and no additional structure is arranged between the loudspeaker and the circuit board (20) to block a transmission path of the sound waves.

Description

Sound-transmitting display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023221818255, filed on August 14, 2023, entitled “A Sound-Transparent Display Device,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of display devices, and in particular to an acoustically transparent display device. Background Art

[0004] Existing LED screens for digital movie projection typically have LEDs arranged vertically and horizontally on a circuit board to display images, with speakers positioned around the screen. However, this structure can cause significant deviations between the sound and image position information and the director's creative intent, resulting in poor overall sound reproduction on the LED screen. To achieve a sound reproduction effect more consistent with traditional screen projection, the current solution is to create through holes in the circuit board, with LEDs mounted on the front and a mounting bracket on the back, with speakers mounted on the bracket. However, the mounting bracket, located between the circuit board and the speaker, blocks the sound wave propagation path, affecting the sound reproduction of the LED screen.

[0005] Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a sound-transmitting display device to solve the problem that the current display screen structure blocks the sound wave propagation path of the speaker.

[0007] The purpose of this application is achieved by the following technical solutions:

[0008] A sound-transmitting display device, characterized by comprising a frame, a circuit board and a plurality of lamp beads;

[0009] The side of the circuit board is connected to the frame, the circuit board has a first surface and a second surface disposed opposite to each other, and the circuit board is provided with a sound-permeable hole communicating with the first surface and the second surface;

[0010] The lamp beads are arranged on the first surface, and the sound-permeable hole is located between two adjacent lamp beads.

[0011] In some optional embodiments, a first sound-transmitting area is provided in the middle of the first surface, and the sound-transmitting holes include a plurality of first sound-transmitting slots arranged in a matrix in the first sound-transmitting area, and the first sound-transmitting slots are located between two adjacent columns or rows of the lamp beads.

[0012] In some optional embodiments, a plurality of first clearance areas are provided in the first sound-transmitting area, and the first sound-transmitting slots are located in a non-overlapping area between the first sound-transmitting area and the first clearance areas.

[0013] In some optional embodiments, one row of lamp beads in the first sound-transmitting area is recorded as a first reference lamp group, another row of lamp beads in the first sound-transmitting area is recorded as a second reference lamp group, there are four rows of lamp beads between the first reference lamp group and the second reference lamp group, the first sound-transmitting slot is perpendicular to the first reference lamp group, and the first sound-transmitting slot is located between the first reference lamp group and the second reference lamp group.

[0014] In some optional embodiments, a second sound-transmitting area is provided on the first surface and is located on the side of the first sound-transmitting area. The sound-transmitting holes include a plurality of second sound-transmitting slots arranged in parallel and parallel to each other. The second sound-transmitting slots are arranged in a matrix in the second sound-transmitting area, and the length of the second sound-transmitting slots is less than the length of the first sound-transmitting slots.

[0015] In some optional embodiments, the sound-transmitting hole includes a plurality of sound-transmitting circular holes, and the sound-transmitting circular holes and the second sound-transmitting slot holes are arranged alternately.

[0016] In some optional embodiments, the sound-transmitting holes include multiple sound-transmitting hole groups, each sound-transmitting hole group includes multiple sound-transmitting circular holes arranged along a reference straight line, the reference straight line is parallel to the second sound-transmitting slot holes, and the sound-transmitting hole groups and the second sound-transmitting slot holes are arranged alternately.

[0017] In some optional embodiments, a plurality of second clearance areas are provided in the second sound-transmitting area, and the second sound-transmitting slots are located in a non-overlapping area between the second sound-transmitting areas and the second clearance areas.

[0018] In some optional embodiments, one row of lamp beads in the second sound-transmitting area is recorded as the third reference lamp group, and another row of lamp beads in the second sound-transmitting area is recorded as the fourth reference lamp group. There are 2 to 3 rows of lamp beads between the third reference lamp group and the fourth reference lamp group. The second sound-transmitting slot is perpendicular to the third reference lamp group, and the second sound-transmitting slot is located between the third reference lamp group and the fourth reference lamp group.

[0019] In some optional embodiments, the opening ratio N of the sound-transmitting holes on the circuit board satisfies: 9.4%≤N≤9.94%.

[0020] In some optional embodiments, a speaker is further included, wherein a side of the speaker is connected to the frame, the speaker is attached to the second surface, and the speaker is arranged opposite to the sound-permeable hole.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The circuit board has a first surface and a second surface arranged opposite to each other and a sound-transmitting hole connecting the first surface and the second surface. The lamp beads are arranged on the first surface, and the sound-transmitting hole is located between two adjacent lamp beads. The side of the circuit board is installed on the frame. The second surface of the circuit board can be used to set up a speaker. The sound waves generated by the speaker are transmitted to the side of the circuit board where the lamp beads are arranged through the sound-transmitting hole, thereby achieving a sound-transmitting effect of the screen, and there is no additional structure between the speaker and the circuit board to block the sound wave transmission path. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of the first surface of a circuit board of an acoustically transparent display device of the present application;

[0024] FIG2 is a schematic structural diagram of the second surface of the circuit board of the acoustically transparent display device of the present application;

[0025] FIG3 is a schematic diagram of the overall structure of the acoustically transparent display device of the present application;

[0026] FIG4 is an enlarged schematic diagram of point A in FIG1 ;

[0027] FIG5 is an enlarged schematic diagram of point B in FIG1 ;

[0028] FIG6 is a schematic diagram of sound attenuation in various frequency bands of the sound-transmitting display device of the present application;

[0029] FIG7 is a schematic diagram of the harmonic distortion coefficients of the acoustically transparent display device of the present application at various frequency bands;

[0030] Figure markings: 10: frame; 20: circuit board; 21: first surface; 211: first sound-transmitting area; 211a: first sound-transmitting slot; 211b: first clearance area; 212: first reference lamp group; 213: second reference lamp group; 214: second sound-transmitting area; 214a: second sound-transmitting slot; 214b: sound-transmitting circular hole; 214c: second clearance area; 215: third reference lamp group; 216: fourth reference lamp group; 22: second surface; 30: lamp beads. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] 1 to 5 , the sound-transmitting display device of the present application is schematically shown, including a frame 10 , a circuit board 20 , a speaker, and a plurality of lamp beads 30 .

[0035] The frame 10 is circular in shape, with the circuit board 20 located on either the front or back of the frame 10. Several screw holes are provided on the inner side of the frame 10, and the side edges of the circuit board 20 are screwed to the screw holes of the frame 10. The circuit board 20 has a first side 21 and a second side 22, which are arranged opposite each other. Sound-permeable holes are provided in the circuit board 20, connecting the first side 21 and the second side 22. The thickness of the circuit board 20 is 2 mm ± 0.15 mm. A thinner circuit board 20 helps reduce sound wave attenuation.

[0036] The lamp beads 30 are disposed on the first surface 21 . The plurality of lamp beads 30 are arranged in a matrix, and the sound-transmitting holes are located between two adjacent lamp beads 30 .

[0037] The side of the speaker is connected to the inner side of the frame 10, and the speaker is attached to the second side 22 of the circuit board 20. The speaker is arranged opposite to the sound hole. Therefore, the sound waves generated by the speaker can be directly transmitted through the sound hole to the direction of the first side 21 of the circuit board 20, and the frame 10 will not block the transmission path of the sound waves, thereby optimizing the sound reproduction effect.

[0038] Specifically, a first sound-transmitting region 211 is defined in the middle of the first surface 21. The first sound-transmitting region 211 is rectangular, and the four sides of the first surface 21 are spaced a certain distance apart from the four sides of the first surface 21. The sound-transmitting holes include a plurality of first sound-transmitting slots 211a arranged in a matrix within the first sound-transmitting region 211. The first sound-transmitting slots 211a are elongated and located between two adjacent columns or rows of lamp beads 30. In this embodiment, the first sound-transmitting slots 211a are located between two adjacent columns of lamp beads 30, and the width of the first sound-transmitting slots 211a is less than or equal to the distance between the two columns of lamp beads 30. Among them, several first giveway areas 211b are provided in the first sound-transmitting area 211, the first giveway areas 211b are rectangular, the first sound-transmitting slots 211a are located in the non-overlapping area between the first sound-transmitting area 211 and the first giveway areas 211b, and the first giveway areas 211b are used to arrange electronic components on the circuit board 20 (for example, it can be a driver chip).

[0039] As shown in Figure 4 , regarding the length of the first sound-transmitting slots 211a, one row of lamp beads 30 within the first sound-transmitting region 211 is designated as the first reference lamp group 212, and another row of lamp beads 30 within the first sound-transmitting region 211 is designated as the second reference lamp group 213. Four rows of lamp beads 30 are located between the first reference lamp group 212 and the second reference lamp group 213. The first sound-transmitting slots 211a are perpendicular to the first reference lamp group 212 and are located between the first reference lamp group 212 and the second reference lamp group 213. The multiple first sound-transmitting slots 211a transmit the majority of sound waves generated by the speaker, meaning that the first sound-transmitting slots 211a are the primary sound-transmitting structure.

[0040] Furthermore, as shown in FIG2 , a second sound-transmitting region 214 is provided on the first surface 21, located to the side of the first sound-transmitting region 211. In this embodiment, the second sound-transmitting region 214 is provided on both sides of the first sound-transmitting region 211. The second sound-transmitting region 214 is rectangular, and the sound-transmitting holes include a plurality of sound-transmitting circular holes 214b and a plurality of second sound-transmitting slots 214a arranged in parallel and parallel to each other. The second sound-transmitting slots 214a are arranged in a matrix within the second sound-transmitting region 214. The length of the second sound-transmitting slots 214a is less than that of the first sound-transmitting slots 211a, and the sound-transmitting circular holes 214b and the second sound-transmitting slots 214a are arranged alternately. The second sound-transmitting slots 214a and the sound-transmitting circular holes 214b can transmit sound waves generated by the edge of the speaker to the direction of the first surface 21 of the circuit board 20, thereby making the sound emitted by the entire sound-transmitting display device more uniform. The alternating arrangement of the sound-transmitting circular holes 214b and the second sound-transmitting slots 214a facilitates wiring on the circuit board 20, allowing some of the circuitry on the circuit board 20 to pass through the sides of the sound-transmitting circular holes 214b. Several second clearance areas 214c are defined within the second sound-transmitting region 214. The second sound-transmitting slots 214a are located within the non-overlapping regions between the second sound-transmitting regions 214 and the second clearance areas 214c. The second clearance areas 214c are used to arrange the electronic components on the circuit board 20.

[0041] In order to improve the opening rate, the sound-transmitting holes include multiple sound-transmitting hole groups, which include multiple sound-transmitting circular holes 214b arranged along a reference line. The reference line is parallel to the second sound-transmitting slots 214a, and the sound-transmitting hole groups and the second sound-transmitting slots 214a are arranged alternately.

[0042] As shown in Figure 5 , the diameter of the sound-transmitting circular hole 214b is less than or equal to the distance between two adjacent rows of lamp beads 30. The width of the second sound-transmitting slot 214a is less than or equal to the distance between two adjacent rows of lamp beads 30. One row of lamp beads 30 within the second sound-transmitting region 214 is designated as the third reference lamp group 215, and another row of lamp beads 30 within the second sound-transmitting region 214 is designated as the fourth reference lamp group 216. There are two to three rows of lamp beads 30 between the third reference lamp group 215 and the fourth reference lamp group 216. The second sound-transmitting slot 214a is perpendicular to the third reference lamp group 215 and is located between the third and fourth reference lamp groups 215, 216. Specifically, there are two rows of lamp beads 30 between the third and fourth reference lamp groups 215, 216 in one second sound-transmitting region 214, and three rows of lamp beads 30 between the third and fourth reference lamp groups 215, 216 in another second sound-transmitting region 214. This facilitates wiring of the circuit board 20 and layout of electronic components while ensuring the opening rate.

[0043] Preferably, the opening ratio N of the sound-transmitting holes on the circuit board 20 satisfies: 9.4% ≤ N ≤ 9.94%. The opening ratio N is the quotient of the total opening area of ​​the sound-transmitting holes divided by the total area of ​​the sound-transmitting regions. The total opening area of ​​the sound-transmitting holes is the sum of the opening areas of all the first sound-transmitting slots, the second sound-transmitting slots, and the sound-transmitting circular holes. The total area of ​​the sound-transmitting regions is the sum of the areas of the first sound-transmitting regions and the two second sound-transmitting regions. In this embodiment, the total area of ​​the sound-transmitting regions is 170 mm*170 mm=28900 mm. 2 .

[0044] Based on the above structure, the sound attenuation of each frequency band of the sound-transmitting display device of the present application is shown in FIG6 , and the harmonic distortion coefficient of each frequency band of the sound-transmitting display device is shown in FIG7 .

[0045] To sum up, the circuit board 20 has a first surface 21 and a second surface 22 arranged opposite to each other and a sound-transmitting hole connecting the first surface 21 and the second surface 22. The lamp beads 30 are arranged on the first surface 21, and the sound-transmitting hole is located between two adjacent lamp beads 30. The side of the circuit board 20 is installed on the frame 10, the side of the speaker is connected to the frame 10, and the speaker is attached to the second surface 22. The sound waves generated by the speaker are transmitted to the side of the circuit board 20 where the lamp beads 30 are provided through the sound-transmitting hole, thereby achieving a sound-transmitting effect of the screen, and there is no additional structure between the speaker and the circuit board 20 to block the sound wave transmission path.

[0046] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A sound-transmitting display device, comprising a frame, a circuit board and a plurality of lamp beads; The circuit board is connected to the frame, the circuit board has a first surface and a second surface disposed opposite to each other, and the circuit board is provided with a sound-permeable hole connected to the first surface and the second surface; The lamp beads are arranged on the first surface, and the sound-permeable hole is located between two adjacent lamp beads.

2. The sound-transmitting display device according to claim 1, wherein: The sound-transmitting holes include a plurality of first sound-transmitting slots arranged in a matrix, and the first sound-transmitting slots are located between two adjacent columns or rows of the lamp beads.

3. The sound-transmitting display device according to claim 2, wherein: The sound-transmitting holes include a plurality of second sound-transmitting slot holes which are arranged in parallel and parallel to each other, and the length of the second sound-transmitting slot holes is smaller than the length of the first sound-transmitting slot holes.

4. The sound-transmitting display device according to claim 3, wherein: The width of the second sound-transmitting slot is smaller than the distance between two adjacent rows of lamp beads.

5. The sound-transmitting display device according to claim 3 or 4, wherein: The sound-transmitting holes include a plurality of sound-transmitting circular holes, and the sound-transmitting circular holes and the second sound-transmitting slot holes are arranged alternately.

6. The sound-transmitting display device according to claim 5, wherein: The sound-transmitting holes include a plurality of sound-transmitting hole groups, each of which includes a plurality of sound-transmitting circular holes arranged along a reference straight line, the reference straight line is parallel to the second sound-transmitting slot holes, and the sound-transmitting hole groups and the second sound-transmitting slot holes are arranged alternately.

7. The sound-transmitting display device according to claim 5 or 6, wherein: The plurality of lamp beads are arranged in a matrix, and the diameter of the sound-transmitting circular hole is less than or equal to the distance between two adjacent rows of lamp beads.

8. The sound-transmitting display device according to any one of claims 3 to 7, wherein the first surface is provided with a first sound-transmitting area, and the first sound-transmitting slot matrix is ​​arranged in the first sound-transmitting area.

9. The sound-transmitting display device according to claim 8, wherein: One row of lamp beads in the first sound-transmitting area is recorded as a first reference lamp group, another row of lamp beads in the first sound-transmitting area is recorded as a second reference lamp group, there are four rows of lamp beads between the first reference lamp group and the second reference lamp group, the first sound-transmitting slot is perpendicular to the first reference lamp group, and the first sound-transmitting slot is located between the first reference lamp group and the second reference lamp group.

10. The sound-transmitting display device according to claim 8 or 9, wherein: The first sound-transmitting area is rectangular, the first surface is rectangular, and there is a distance between four sides of the first sound-transmitting area and four sides of the first surface.

11. The sound-transmitting display device according to any one of claims 8 to 10, wherein: A first clearance area is provided in the first sound-transmitting area, and electronic components are arranged in the first clearance area.

12. The sound-transmitting display device according to any one of claims 8 to 11, wherein: A second sound-transmitting area is provided on the first surface and is located at the side of the first sound-transmitting area. The second sound-transmitting slots are arranged in a matrix in the second sound-transmitting area.

13. The sound-transmitting display device according to any one of claims 5 to 7, wherein: A first sound-transmitting area and a second sound-transmitting area located on the side of the first sound-transmitting area are provided on the first surface, the first sound-transmitting slot matrix is ​​arranged in the first sound-transmitting area, and the second sound-transmitting slots and the sound-transmitting circular holes are arranged in the second sound-transmitting area.

14. The sound-transmitting display device according to claim 12 or 13, wherein: Second sound-transmitting areas are arranged on both sides of the first sound-transmitting area.

15. The sound-transmitting display device according to any one of claims 12 to 14, wherein: One row of lamp beads in the second sound-transmitting area is recorded as the third reference lamp group, and another row of lamp beads in the second sound-transmitting area is recorded as the fourth reference lamp group. There are 2 to 3 rows of lamp beads between the third reference lamp group and the fourth reference lamp group. The second sound-transmitting slot is perpendicular to the third reference lamp group, and the second sound-transmitting slot is located between the third reference lamp group and the fourth reference lamp group.

16. The sound-transmitting display device according to any one of claims 1 to 15, wherein: The opening ratio N of the sound-transmitting holes on the circuit board satisfies: 9.4%≤N≤9.94%.

17. The sound-transmitting display device according to any one of claims 1 to 16, further comprising a speaker, a side of the speaker being connected to the frame, the speaker being attached to the second surface, and the speaker being arranged opposite to the sound-transmitting hole.

18. The sound-transmitting display device according to any one of claims 1 to 17, wherein: The frame is in a circular shape, the circuit board is located on the front or side of the frame, screw holes are arranged on the inner side of the frame, and the side edges of the circuit board are connected to the screw holes by screws.

19. The sound-transmitting display device according to any one of claims 1 to 18, wherein: The thickness of the circuit board is 2 mm ± 0.15 mm.

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